"""
编写一个函数，其作用是将输入的字符串反转过来。输入字符串以字符数组 char[] 的形式给出。

不要给另外的数组分配额外的空间，你必须原地修改输入数组、使用 O(1) 的额外空间解决这一问题。

你可以假设数组中的所有字符都是 ASCII 码表中的可打印字符。



示例 1：

输入：["h","e","l","l","o"]
输出：["o","l","l","e","h"]
示例 2：

输入：["H","a","n","n","a","h"]
输出：["h","a","n","n","a","H"]
"""
def reverseString(s):
    for i in range(len(s)//2):
        temp = s[i]
        s[i] = s[-i-1]
        s[-i-1]=temp
    return s
def reverseString2(s):
    s[:] = s[::-1]
    return s
list = [1,2,3,4,5]
print(reverseString(list))